Computes and draws contour lines.
ly_contour(fig, z, x = seq(0, 1, length.out = nrow(z)), y = seq(0, 1,
length.out = ncol(z)), nlevels = 10, levels = pretty(range(z, na.rm =
TRUE), nlevels), color = "black", alpha = 1, width = 1, type = 1,
lname = NULL, lgroup = NULL, visible = TRUE, ...)
figure to modify
a matrix containing the values to compute contour lines for
locations of grid lines at which the values in image
are measured (see contourLines
)
parameters sent to contourLines
)
color to use to stroke lines with - a hex code (with no alpha) or any of the 147 named CSS colors, e.g 'green', 'indigo'
transparency value for the line between 0 (transparent) and 1 (opaque)
stroke width in units of pixels
an integer between 1 and 6 matching the lty
property in par
or an array of integer pixel distances that describe the on-off pattern of dashing to use
layer name
layer group
should the layer be visible?
additional parameters for fine control over line properties (see "Additional parameters" below)
line_join |
how path segments should be joined together 'miter' 'round' 'bevel' |
line_cap |
how path segments should be terminated 'butt' 'round' 'square' |
line_dash |
an integer between 1 and 6 matching the lty property in par or an array of integer pixel distances that describe the on-off pattern of dashing to use |
Other layer functions: ly_abline
,
ly_annular_wedge
, ly_annulus
,
ly_arc
, ly_bar
,
ly_bezier
, ly_boxplot
,
ly_crect
, ly_curve
,
ly_density
, ly_hist
,
ly_image_url
, ly_image
,
ly_lines
, ly_map
,
ly_multi_line
, ly_oval
,
ly_patch
, ly_points
,
ly_polygons
, ly_quadratic
,
ly_quantile
, ly_ray
,
ly_rect
, ly_segments
,
ly_text
, ly_wedge
# NOT RUN {
p <- figure(xlim = c(0, 1), ylim = c(0, 1), title = "Volcano") %>%
ly_image(volcano) %>%
ly_contour(volcano)
p
# }
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